Fred,
I looked around and found a solid piece of wire rated for 600V, I take that to mean the insulation is rated at 600V. Problem with shielded wire is that it isn't rated for voltage as far as I've seen. I also want to use solid conductor wire for this. The tubes look like 300V at 11ma. so current isn't an issue but voltage might be.
Squidward,
I never thought about capacitance in shielded wire. Thanks for your input on that. That wire is about 4" long from the input to the cap on the first tube so I don't think that will be to much to cause trouble but I might see if I can measure anything in the wire.
As always guys if you've "been there, done that" I like to hear about it!
Dave